The "Marchand Salpingectomy" surgical technique was developed by Marchand shortly after the American College of Obstetrics and Gynecology released Committee Opinion #620.[14] The committee opinion dramatically changed gynecologic surgery by recommending salpingectomy (removal of the fallopian tubes) in instances where tubal ligation (tying the fallopian tubes) previously would have been recommended.[14] Marchand originally described and published the technique at the October 24, 2017 Clinical Congress of the American College of Surgeons in San Diego, CA.[1][2]

Dr. Richard Demir and Marchand authored an unnamed technique for the laparoscopic placement of a cervical cerclage to prevent cervical insufficiency leading to preterm births. A video describing this technique was later published at the 32nd British International Congress of Obstetricians and Gynecology, in Belfast, UK on June 20, 2010.[3][15] This technique was added to the published list of core competencies at the Rutgers University New Jersey School of Medicine in 2018.[16]

Marchand, along with Dr Richard Demir removed the largest uterus ever removed via a completely laparoscopic hysterectomy in 2007.[17] The uterus was 3200 grams and the world record was verified and recognized by Guinness World Records in 2008.[10] An abstract describing the surgical technique and details was later published in the 4th quarter issue of the 2010 Journal of the Society of Laparoendoscopic Surgeons.[18] This record was later broken in 2009 by Dr. Rakesh Sinha of the BEAMS Hospital in Mumbai, India with a 4100 gram uterus.[19]

In 2015, Marchand removed a 17 centimeter ovarian mass from a patient that was initially presumed to be benign.[8][6][7][11] Intraoperative pathology showed the mass to be malignant, and Dr. Snehal Bhoola, gynecologic oncologist, assisted Marchand in completing the entire Ovarian Cancer Staging Surgery by laparoscopic means. The combination of the removal of the very large mass and the complete staging procedure was the largest Ovarian Mass to ever receive Surgical Staging by completely laparoscopic means. This record was verified and recognized by the World Record Academy in 2017.[11] The record received significant criticism because although the mass was not known to be cancerous prior to removal, it was removed using laparoscopic morcellation, which has been shown increase the risk of spreading a cancer throughout the abdomen.[20][21]

In 2010, Marchand was diagnosed with a choriocarcinoma, an aggressive testicular cancer.[6] Marchand underwent surgery and treatments that year and reports that he has been in remission since that time.[7] Marchand cites his own personal battle as his inspiration for creating surgical techniques to treat cancer in interviews and publications.[9]

Both of Marchand's records involve morcellation, a surgical process that has been shown in studies to have to potential to spread cancerous cells throughout the patient.[20] Marchand received significant criticism following his second world record in 2017, as this record, unlike the first, was performed after the FDA warning on morcellation was issued in 2014.[22]